Ergonomic putty knife



FIG. 1 is a rear, left side perspective view of the ergonomic putty knife of the invention;

FIG. 2 is a front, right side perspective view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and

FIG. 9 is a top perspective view thereof. 

The ornamental design for ergonomic putty knife, substantially as shown and described. 